CN104570195A - Light guide plate, liquid crystal displayer backlight module and light guide plate manufacturing device - Google Patents
Light guide plate, liquid crystal displayer backlight module and light guide plate manufacturing device Download PDFInfo
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- CN104570195A CN104570195A CN201410855642.XA CN201410855642A CN104570195A CN 104570195 A CN104570195 A CN 104570195A CN 201410855642 A CN201410855642 A CN 201410855642A CN 104570195 A CN104570195 A CN 104570195A
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- light guide
- guide plate
- light
- columnar projections
- rolling wheel
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
- G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
Abstract
The invention discloses a light guide plate, a liquid crystal displayer backlight module and a light guide plate manufacturing device. The light guide plate comprises a first surface and a second surface which are parallel. Parallel cylindrical protrusions are formed on the first surface and light guide openings are formed in the second surface. Compared with an existing light guide plate, the light guide plate has the better light bundling effect, and crosstalk of light in the light guide plate is reduced to the great extent.
Description
Technical field
The present invention relates to technical field of liquid crystal display, specifically, relate to a kind of light guide plate, LCD backlight module and apparatus for manufacturing light guide plate.
Background technology
Along with the development of mobile technology, mobile phone has become requisite communication tool in people's daily life.Current liquid crystal display (Liquid Crystal Display, referred to as LCD) is the mobile phone display screen curtain commonly used the most.Lcd technology experienced by from black and white screen to color/graphics and the development from twisted nematic LCD (TN-LCD) to thin film transistor (TFT) LCD (TFT-LCD).
Fig. 1 a and Fig. 1 b respectively illustrates the structural representation of existing backlight module and the light guide effect figure of light guide plate.As can be seen from Fig. 1 a, existing backlight module have employed the form of side light source, is namely arranged on the side of light guide plate as the LED of light source.When LED lights, the light that LED sends enters into light guide plate by the side of light guide plate.As can be seen from the light guide effect figure of the light guide plate shown by Fig. 1 b, the light be injected in light guide plate presents the form of dispersing.This shows that existing light guide plate cannot play bundle light action to the light injected effectively, and this also just makes light in light guide plate easily crosstalk occur.
Based on above-mentioned situation, need a kind of light guide plate effectively can avoiding internal light generation crosstalk badly.
Summary of the invention
Problem to be solved by this invention how to avoid catheter plate internal light generation crosstalk.For solving the problem, embodiments of the invention provide firstly a kind of light guide plate, and described light guide plate comprises the first surface and second surface that are parallel to each other, and described first surface is formed with the columnar projections be parallel to each other, and described second surface is formed with light guide opening.
According to an embodiment of this invention, described second surface is also formed with the columnar projections be parallel to each other, and described light guide opening is formed in the columnar projections of second surface.
According to an embodiment of this invention, interval predeterminable range between adjacent columnar projections.
According to an embodiment of this invention, described light guide opening is along the direction non-uniform Distribution being parallel to columnar projections.
According to an embodiment of this invention, far away apart from the first end of described columnar projections, the spacing distance between two the adjacent light guide opening in same columnar projections is shorter.
Present invention also offers a kind of liquid crystal panel backlight module, described backlight module comprises circuit of light sources and light guide plate, described circuit of light sources is arranged on the side of light guide plate, wherein, described light guide plate is the light guide plate as above described in any one, and described light guide plate is penetrated by front after being processed by the light injected from the side.
Present invention also offers a kind of device manufacturing light guide plate, described device comprises:
Melting furnace, it exports after being melted by light guide plate starting material;
Roll-in portion, it is for carrying out roll-in to the light guide plate starting material from melting furnace, and form the light guide plate comprising first surface and second be parallel to each other, described first surface is formed with the columnar projections be parallel to each other;
Transport unit, it is for being sent to production line rear end by the light guide plate from roll-in portion, and described transport unit comprises multiple elastic roller be arranged side by side, to support and to transport the light guide plate from roll-in portion.
According to an embodiment of this invention, described roll-in portion comprises the first rolling wheel set and the second rolling wheel set that are fitted to each other and rotate, and the first rolling wheel set and/or the second rolling wheel set are provided with projection.
According to an embodiment of this invention, the projection in described first rolling wheel set and/or the second rolling wheel set is circumferential projection.
According to an embodiment of this invention, described device also comprises:
Overlay film portion, it is for carrying out aluminum coated steel, to form diaphragm in light guide plate to the light guide plate from transport unit.
Compared to the circuit of light sources of existing backlight module, the circuit of light sources in backlight module provided by the present invention can realize controlling the independence of luminescence unit.Like this, when needing to light whole luminescence unit according to the display of liquid crystal display, the luminescence unit of needs can be lighted by control circuit, is extinguished by unwanted luminescence unit simultaneously.Because luminescence unit does not need all to be in illuminating state, therefore also just effectively reduce the energy consumption of backlight module, thus extend the use duration of electricity consumption device.
In addition, circuit of light sources provided by the present invention can also realize the adjustable of light-source brightness.Particularly, gate-controlled switch, by the dutycycle of regulable control signal, can regulate the duration that light emitting diode is lighted or extinguished.And within a period of time, the duration that light emitting diode is lighted is longer, so light source looks also brighter; Otherwise within a period of time, the duration that light emitting diode is lighted is shorter, so light source looks also darker.So also just achieve the adjustment to light-source brightness.
Surface due to light guide plate provided by the present invention is provided with the columnar projections be parallel to each other, and presents the state relatively collected when columnar projections can make light transmit in light guide plate.Therefore, compared to existing light guide plate, light guide plate provided by the present invention has restraints light effect better.This also just makes the crosstalk of light in light guide plate significantly be reduced.
In order to ensure the light-emitting uniformity of light guide plate surface, in light guide plate provided by the present invention, the distribution mode of light guide opening is uniform distribution.Particularly, be provided with in the columnar projections of light guide opening at each, the first end (namely near one end of luminescence unit) of distance columnar projections is far away, and the interval between two light guide opening adjacent in this columnar projections is shorter, and namely the distribution of light guide opening is more intensive.
The light penetrated near each light guide opening of luminescence unit is more, but comparatively sparse near the position light guide opening distribution of luminescence unit; And the light penetrated away from each light guide opening of luminescence unit is less, but comparatively intensive away from the position light guide opening distribution of luminescence unit.The light so also just making light guide plate regional penetrate is comparatively balanced, thus ensure that the light-emitting uniformity of light guide plate surface.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from instructions, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, do simple introduction by accompanying drawing required in embodiment or description of the prior art below:
Fig. 1 a is the structural representation of existing backlight module;
Fig. 1 b is the light path design sketch in existing light guide plate;
Fig. 2 is the circuit diagram of the circuit of light sources of existing liquid crystal panel backlight module;
Fig. 3 is the circuit diagram of the circuit of light sources of backlight module according to an embodiment of the invention;
Fig. 4 and Fig. 5 is front view and the vertical view of light guide plate according to an embodiment of the invention respectively;
Fig. 6 is the structural representation of apparatus for manufacturing light guide plate according to an embodiment of the invention;
Fig. 7 is the structural representation of backlight module according to an embodiment of the invention;
Fig. 8 is a light path design sketch when luminescence unit is lighted according to an embodiment of the invention in light guide plate;
Fig. 9 is the light path design sketch of multiple according to an embodiment of the invention luminescence unit when lighting in light guide plate;
Figure 10 is the index path according to an embodiment of the invention in light guide plate;
Figure 11 is the arrangement schematic diagram of the light guide opening according to an embodiment of the invention in light guide plate;
Figure 12 and Figure 13 is front view and the vertical view of light guide plate in accordance with another embodiment of the present invention respectively;
Figure 14 is the structural representation of the light guide plate according to another embodiment of the present invention;
Figure 15 is the structural representation of the light guide plate according to another embodiment of the present invention.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical matters whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
Meanwhile, in the following description, many details have been set forth for illustrative purposes, to provide thorough understanding of embodiments of the invention.But, it will be apparent to those skilled in the art that the present invention can detail here or described ad hoc fashion implement.
Along with the development of lcd technology, the size being applied in the liquid crystal display in mobile phone is also constantly becoming large, and this energy consumption that also just result in liquid crystal display is also thereupon more and more higher.Backlight module is the main power consuming units of liquid crystal display, and Fig. 2 shows the circuit diagram of circuit of light sources in existing backlight module.As shown in Figure 2, existing circuit of light sources is formed in parallel by multichannel circuit of LED, and wherein, each road circuit of LED is in series by multiple light emitting diode again.And this structure of circuit of light sources makes the liquid crystal display of mobile phone operationally, how bright dark distribution and the demand of the picture no matter display shows change, light emitting diode in circuit of light sources is all in the state all lighted, and namely the energy consumption of illuminating circuit continues to maintain 100%.
This structure of existing backlight module makes the energy consumption of LCDs usually account for 60% ~ 70% of the overall energy consumption of mobile phone.Due to the restriction of cell phone battery capacity, this high energy consumption characteristic of LCDs also greatly shortens the standby time of mobile phone.
In order to solve the too high problem of existing LCD backlight module energy consumption, present embodiments provide a kind of LCD backlight module that independently can control the light on and off state of each luminescence unit, this backlight module comprises circuit of light sources and light guide plate.
Fig. 3 shows the circuit diagram of the circuit of light sources of this backlight module.
As shown in Figure 3, the circuit of light sources that the present embodiment provides comprises control circuit 302 and multiple luminescence unit 301.Wherein, each luminescence unit 301 is connected with the corresponding port of control circuit 302, to light under the control of control circuit 302 or to extinguish.In the present embodiment, luminescence unit is arranged on the side of light guide plate, as the side light source of light guide plate.Light guide plate is penetrated by the front of light guide plate after the light injected from the side can being processed, and is converted to area source by side light source.
In the present embodiment, the first port of each luminescence unit is connected with the first port of default power supply, and the second port is connected with the corresponding port of control circuit 302.As shown in Figure 3, adopt light emitting diode as luminescence unit in the backlight module that the present embodiment provides.Wherein, the positive pole of light emitting diode is connected with the positive pole (i.e. A port) of default power supply, and the negative pole of light emitting diode is connected with the corresponding port of control circuit 302.
In the present embodiment, control circuit 302 comprises gate-controlled switch, and this gate-controlled switch comprises the first port and multiple second port.Wherein, the first port of gate-controlled switch is connected with the negative pole (i.e. K port) of default power supply, and each second port is connected with the negative pole of corresponding light emitting diode.
When light emitting diode D1 lighted by needs, gate-controlled switch is by conducting B
1connection between port and K port.Now the voltage at light emitting diode D1 two ends reaches operating voltage, thus outwards emits beam.Because gate-controlled switch can independently control to close each port (the i.e. B be connected with light emitting diode
1port ~ B
nport) with the break-make be connected between K port, therefore gate-controlled switch also just can realize controlling the independence of each light emitting diode light on and off state.This that is, gate-controlled switch can control one or more light emitting diode and lights simultaneously or extinguish.
Compared to the circuit of light sources of existing backlight module, the circuit of light sources that the present embodiment provides can realize controlling the independence of luminescence unit.Like this, when lighting whole luminescence unit according to the display demand of liquid crystal display, the luminescence unit of needs can be lighted by control circuit, is extinguished by unwanted luminescence unit simultaneously.Because luminescence unit does not need all to be in illuminating state, therefore also just effectively reduce the energy consumption of backlight module.Compared to existing circuit of light sources, the energy consumption of the circuit of light sources that the present embodiment provides can reduce about 40%.The reduction of circuit of light sources energy consumption also effectively can extend the use duration of electricity consumption device (such as mobile phone).
In addition, the circuit of light sources that the present embodiment provides can also regulate light-source brightness.Particularly, in the present embodiment, gate-controlled switch 202, by the dutycycle of regulable control signal, can realize the adjustment of the duration lighted light emitting diode or extinguish.And within a period of time, the duration that light emitting diode is lighted is longer, so light source looks also brighter; Otherwise within a period of time, the duration that light emitting diode is lighted is shorter, so light source looks also darker.So also just achieve the adjustment to light-source brightness.
It should be noted that, in other embodiments of the invention, luminescence unit and/or control circuit also can adopt other rational circuit forms to realize, and the present invention is not limited thereto.Such as in one embodiment of the invention, control circuit adopts FPGA circuit to realize, and FPGA circuit can make on-off circuit have response speed faster, thus makes control circuit more timely accurately to the control of luminescence unit.
Existing light guide plate cannot play bundle light action to the light injected effectively, thus causes light in light guide plate easily crosstalk to occur.In order to solve this problem, the present embodiment additionally provides a kind of light guide plate that effectively can play bundle light action.Fig. 4 and Fig. 5 respectively illustrates front view and the vertical view of the light guide plate that the present embodiment provides.As can be seen from Fig. 4 and Fig. 5, the light guide plate that the present embodiment provides comprises the first surface 401 and second surface 402 that are parallel to each other, first surface 401 with second surface 402 is provided with parallel columnar projections 403, be separated with predeterminable range between adjacent columnar projections.
Fig. 6 shows the device for the manufacture of light guide plate as shown in Figure 4 and Figure 5 that the present embodiment provides.
In the present embodiment example, light guide plate starting material are engineering plastic.In the process of producing, first first engineering plastic melts as liquid by thawing furnace, subsequently the engineering plastic of liquid state is transported to roll-in portion by T-shaped head.Certain distance is there is between T-shaped head and roll-in portion.Liquid engineering plastic slowly cools the process declined after T-shaped head exports, and when arriving roll-in portion, engineering plastic does not cool completely, thus is conducive to roll-forming.
In the present embodiment, the roll-in portion of apparatus for manufacturing light guide plate comprises the first rolling wheel set and the second rolling wheel set that are fitted to each other and rotate.Owing to needing all to form columnar projections at the first surface of light guide plate and second surface, therefore in the present embodiment, the first rolling wheel set and the second rolling wheel set are provided with projection.First rolling wheel set and the second rolling wheel set can carry out roll-in to the engineering plastic do not cooled completely from T-shaped head, thus form light conducting plate structure as shown in Figure 4 and Figure 5.
In different embodiments of the invention, the projection in rolling wheel set can be multiple circumferential projection being arranged on roll-in axle surface, also can be multiple axial columnar projections being arranged on roll-in axle surface.Projection in the present embodiment in the first rolling wheel set and the second rolling wheel set is circumferential projection.There is the rolling wheel set of circumferential projection when suppressing engineering plastic because this, confined space can not be formed by protruding with roll-in axle, thus effectively can discharge the air in engineering plastic.The structure of the light guide plate that this structure of rolling wheel set also just makes roll-in obtain is more even, and the impurity of light guide plate inside is less, thus ensure that the guide-lighting performance that light guide plate is good.
After roll-in portion completes the roll-in to engineering plastic, light guide plate can be transferred in transport unit, the light guide plate from roll-in portion is carried to production line rear end by transport unit.Owing to not cooling completely from the light guide plate in roll-in portion, the process of therefore light guide plate transmission in transmission is also the process of light guide plate cooling.In order to ensure that light guide plate is not damaged in this course, in the present embodiment, transport unit comprises multiple elastic roller be arranged side by side, to support and to transport the light guide plate from roll-in portion.
In the process that light guide plate after roll-in is transmitted in transport unit, the defects detection portion in this manufacturing installation also can carry out defect inspection to light guide plate, to guarantee structural intergrity and the reliability of light guide plate.In addition, have columnar projections owing to producing the light guide plate obtained, this also just causes easy dust stratification between columnar projections.For this reason, the apparatus for manufacturing light guide plate that the present embodiment provides also can carry out aluminum coated steel to light guide plate after carrying out defect inspection, applies upper protective film respectively with the upper and lower surface in light guide plate.This diaphragm not only effectively can ensure the cleanliness factor of light guide plate and dustless degree, but also the surface of light guide plate can also be protected not receive damage.In the present embodiment, be coated in diaphragm in light guide plate for there being glued membrane.Certainly, in other embodiments of the invention, the diaphragm of other proper form can also be adopted to apply light guide plate, the present invention is not limited thereto.
Finally, by carrying out slicing treatment to the light guide plate after overlay film, the light guide plate of required size can be obtained.
In order to clearly present the bundle optical property of the light guide plate shown in Fig. 4 and Fig. 5, luminescence unit, according to the mode shown in Fig. 7, is placed on the side of light guide plate by the present embodiment, and the power supply opening luminescence unit makes it normally work.Fig. 8 and Fig. 9 respectively illustrates index path when opening a luminescence unit and multiple luminescence unit in light guide plate.
As can be seen from Fig. 8 and Fig. 9, columnar projections set by the light guide plate that the present embodiment provides presents the state relatively collected when light can be made to transmit in light guide plate, therefore compared to existing light guide plate, the light guide plate that the present embodiment provides has restraints light effect better.This also just makes the crosstalk of light in light guide plate significantly be reduced.
Because one of the effect of light guide plate is that side light source is converted to area source, so also just need to make the light in light guide plate penetrate from light guide plate surface.And the light in light guide plate is the form transmission be totally reflected, in order to light can be made to penetrate from light guide plate surface, also just need this total reflection structure destroying light guide plate.
As shown in Figure 10, the light guide plate that the present embodiment provides, by arranging light guide opening in columnar projections, destroys the total reflection structure of light guide plate.Like this, the some light in light guide plate just can be penetrated by this light guide opening, thus achieves function side light source being converted to area source.In the present embodiment, as shown in figure 11, light guide opening is all arranged in the columnar projections on the second surface of light guide plate, so also just ensure that light can not penetrate from the first surface of light guide plate, thus ensure that the utilization factor of the light that circuit of light sources sends, improve the brightness of backlight module.
Because luminescence unit is the side being arranged on light guide plate, and the light injected in light guide plate can penetrate from by each light guide opening.Therefore like this by fewer for the light caused emitted by the light guide opening far away apart from luminescence unit.In order to ensure the light-emitting uniformity of light guide plate surface, in the light guide plate that the present embodiment provides, the distribution mode of light guide opening is light guide opening uniform distribution.Particularly, be provided with in the columnar projections of light guide opening at each, the first end (namely near one end of luminescence unit) of distance columnar projections is far away, and the interval between two light guide opening adjacent in this columnar projections is shorter, and namely the distribution of light guide opening is more intensive.
The light penetrated near each light guide opening of luminescence unit is more, but comparatively sparse near the position light guide opening distribution of luminescence unit; And the light penetrated away from each light guide opening of reflecting unit is less, but comparatively intensive away from the position light guide opening distribution of luminescence unit.The light so also just making light guide plate regional penetrate is comparatively balanced, thus ensure that the light-emitting uniformity of light guide plate surface.
It should be noted that, in other embodiments of the invention, other rational methods can also be adopted to guarantee the light-emitting uniformity of light guide plate, the present invention is not limited thereto.
In one embodiment of the invention, light guide plate also can adopt structure as shown in Figure 12 and Figure 13.Figure 12 and Figure 13 respectively illustrates front view and the vertical view of this light guide plate.As can be seen from these two figure, compared to Fig. 4 and light guide plate illustrated in fig. 5, between columnar projections adjacent in this light guide plate, there is no interval, and first surface and second surface are on same plane.This light guide plate also just can be considered as being arranged side by side by multiple right cylinder forming.
In yet another embodiment of the present invention, light guide plate also can adopt structure as shown in figure 14.Composition graphs 4 can be found out, compared to the light guide plate shown in Fig. 4, this light guide plate is only formed with columnar projections at first surface, and second surface is still planar structure.In this embodiment, light guide opening is all arranged on second surface.This is because second surface is planar structure, and in planar structure, form light guide opening more easy (mode such as such as wet etching erosion).The columnar projections of first surface is formed light guide opening comparatively difficulty (usually needing to adopt the techniques such as laser ablation), if form light guide opening in the columnar projections of first surface, production difficulty and the cost of light guide plate can be significantly improved.Certainly, when technique and cost license, light guide opening also can be arranged in the columnar projections of first surface, the present invention is not limited thereto.Correspondingly, among the first rolling wheel set comprised for the production of the roll-in portion of the device of this catheter plate and the second rolling wheel set, one will be only had to be provided with projection.
In yet another embodiment of the present invention, light guide plate can adopt structure as described in Figure 15.Can find out in conjunction with Figure 14, the light guide plate shown in Figure 15 does not exist except interval except between adjacent column projection, and other structures are all identical with the light guide plate shown in Figure 14, do not repeat them here.
Compared to the circuit of light sources of existing backlight module, the circuit of light sources in backlight module provided by the present invention can realize controlling the independence of luminescence unit.Like this, when needing to light whole luminescence unit according to the display of liquid crystal display, the luminescence unit of needs can be lighted by control circuit, is extinguished by unwanted luminescence unit simultaneously.Because luminescence unit does not need all to be in illuminating state, therefore also just effectively reduce the energy consumption of backlight module, thus extend the use duration of electricity consumption device.
In addition, circuit of light sources provided by the present invention can also realize the adjustable of light-source brightness.Particularly, gate-controlled switch, by the dutycycle of regulable control signal, can realize the adjustment of the duration lighted light emitting diode or extinguish.And within a period of time, the duration that light emitting diode is lighted is longer, so light source looks also brighter; Otherwise within a period of time, the duration that light emitting diode is lighted is shorter, so light source looks also darker.So also just achieve the adjustment to light-source brightness.
Surface due to light guide plate provided by the present invention is provided with the columnar projections be parallel to each other, and presents the state relatively collected when columnar projections can make light transmit in light guide plate.Therefore, compared to existing light guide plate, light guide plate provided by the present invention has restraints light effect better.This also just makes the crosstalk of light in light guide plate significantly be reduced.
In order to ensure the light-emitting uniformity of light guide plate surface, in light guide plate provided by the present invention, the distribution mode of light guide opening is light guide opening uniform distribution.Particularly, be provided with in the columnar projections of light guide opening at each, the first end (namely near one end of luminescence unit) of distance columnar projections is far away, and the interval between two light guide opening adjacent in this columnar projections is shorter, and namely the distribution of light guide opening is more intensive.
The light penetrated near each light guide opening of luminescence unit is more, but comparatively sparse near the position light guide opening distribution of luminescence unit; And the light penetrated away from each light guide opening of reflecting unit is less, but comparatively intensive away from the position light guide opening distribution of luminescence unit.The light so also just making light guide plate regional penetrate is comparatively balanced, thus ensure that the light-emitting uniformity of light guide plate surface.
It should be understood that disclosed embodiment of this invention is not limited to ad hoc structure disclosed herein, treatment step or material, and the equivalent of these features that those of ordinary skill in the related art understand should be extended to substitute.It is to be further understood that term is only for describing the object of specific embodiment as used herein, and and do not mean that restriction.
Special characteristic, structure or characteristic that " embodiment " mentioned in instructions or " embodiment " mean to describe in conjunction with the embodiments comprise at least one embodiment of the present invention.Therefore, instructions various places throughout occur phrase " embodiment " or " embodiment " might not all refer to same embodiment.
Conveniently, multiple project, structural unit, component units and/or material can appear in common list as used herein.But each element that these lists should be interpreted as in this list is identified as member unique separately respectively.Therefore, when not having reverse side to illustrate, in this list, neither one member only can appear in common list the actual equivalent of other member any being just interpreted as same list based on them.In addition, can also come together with reference to various embodiment of the present invention and example together with for the alternative of each element at this.Should be understood that, these embodiments, example and substitute and be not interpreted as equivalent each other, and be considered to representative autonomous separately of the present invention.
In addition, described feature, structure or characteristic can be attached in one or more embodiment in any other suitable manner.In superincumbent description, provide some concrete details, such as length, width, shape etc., to provide the complete understanding to embodiments of the invention.But those skilled in the relevant art will understand, the present invention just can realize without the need to above-mentioned one or more concrete details, or also can adopt the realizations such as other method, assembly, material.In other example, known structure, material or operation are not shown specifically or describe in order to avoid fuzzy various aspects of the present invention.
Although above-mentioned example is for illustration of the principle of the present invention in one or more application, but for a person skilled in the art, when not deviating from principle of the present invention and thought, obviously can in form, the details of usage and enforcement does various amendment and need not creative work be paid.Therefore, the present invention is limited by appending claims.
Claims (10)
1. a light guide plate, is characterized in that, described light guide plate comprises the first surface and second surface that are parallel to each other, and described first surface is formed with the columnar projections be parallel to each other, and described second surface is formed with light guide opening.
2. light guide plate as claimed in claim 1, it is characterized in that, described second surface is also formed with the columnar projections be parallel to each other, and described light guide opening is formed in the columnar projections of second surface.
3. light guide plate as claimed in claim 1 or 2, is characterized in that, interval predeterminable range between adjacent columnar projections.
4. light guide plate as claimed in claim 1, is characterized in that, described light guide opening is along the direction non-uniform Distribution being parallel to columnar projections.
5. light guide plate as claimed in claim 4, it is characterized in that, far away apart from the first end of described columnar projections, the spacing distance between two the adjacent light guide opening in same columnar projections is shorter.
6. a liquid crystal panel backlight module, is characterized in that, described backlight module comprises circuit of light sources and light guide plate, and described circuit of light sources is arranged on the side of light guide plate, wherein,
Described light guide plate is the light guide plate such as according to any one of Claims 1 to 5, and described light guide plate is penetrated by front after being processed by the light injected from the side.
7. manufacture a device for light guide plate, it is characterized in that, described device comprises:
Melting furnace, it exports after being melted by light guide plate starting material;
Roll-in portion, it is for carrying out roll-in to the light guide plate starting material from melting furnace, and form the light guide plate comprising first surface and second be parallel to each other, described first surface is formed with the columnar projections be parallel to each other;
Transport unit, it is for being sent to production line rear end by the light guide plate from roll-in portion, and described transport unit comprises multiple elastic roller be arranged side by side, to support and to transport the light guide plate from roll-in portion.
8. device as claimed in claim 7, is characterized in that, described roll-in portion comprises the first rolling wheel set and the second rolling wheel set that are fitted to each other and rotate, and the first rolling wheel set and/or the second rolling wheel set are provided with projection.
9. device as claimed in claim 8, is characterized in that, the projection in described first rolling wheel set and/or the second rolling wheel set is circumferential projection.
10. the device according to any one of claim 7 ~ 9, is characterized in that, described device also comprises:
Overlay film portion, it is for carrying out aluminum coated steel, to form diaphragm in light guide plate to the light guide plate from transport unit.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410855642.XA CN104570195A (en) | 2014-12-31 | 2014-12-31 | Light guide plate, liquid crystal displayer backlight module and light guide plate manufacturing device |
| PCT/CN2015/071223 WO2016106903A1 (en) | 2014-12-31 | 2015-01-21 | Light guide plate, backlight module of liquid crystal panel, and manufacturing device for light guide plate |
| US14/417,822 US10132981B2 (en) | 2014-12-31 | 2015-01-21 | Light guide plate, backlight module of liquid crystal display panel, and device for manufacturing light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410855642.XA CN104570195A (en) | 2014-12-31 | 2014-12-31 | Light guide plate, liquid crystal displayer backlight module and light guide plate manufacturing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104570195A true CN104570195A (en) | 2015-04-29 |
Family
ID=53086704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410855642.XA Pending CN104570195A (en) | 2014-12-31 | 2014-12-31 | Light guide plate, liquid crystal displayer backlight module and light guide plate manufacturing device |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US10132981B2 (en) |
| CN (1) | CN104570195A (en) |
| WO (1) | WO2016106903A1 (en) |
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| CN107219585A (en) * | 2017-04-13 | 2017-09-29 | 芜湖德仓光电有限公司 | A kind of light guide plate and the backlight module using the light guide plate |
| CN108873155A (en) * | 2018-08-09 | 2018-11-23 | 嘉兴市创杰电子科技有限公司 | A kind of production method and its structure of light guide plate |
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Also Published As
| Publication number | Publication date |
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| US10132981B2 (en) | 2018-11-20 |
| US20160245978A1 (en) | 2016-08-25 |
| WO2016106903A1 (en) | 2016-07-07 |
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Application publication date: 20150429 |